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Validation and automation of the DYNJAWS component module of the BEAMnrc Monte Carlo code

Kakakhel, Muhammad, Baveas, Emmanuel, Fielding, Andrew L., Kairn, Tanya, Kenny, John, & Trapp, Jamie (2011) Validation and automation of the DYNJAWS component module of the BEAMnrc Monte Carlo code. Australasian Physical and Engineering Sciences in Medicine, 34(1), pp. 83-90.

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Abstract

The purpose of this work is to validate and automate the use of DYNJAWS; a new component module (CM) in the BEAMnrc Monte Carlo (MC) user code. The DYNJAWS CM simulates dynamic wedges and can be used in three modes; dynamic, step-and-shoot and static. The step-and-shoot and dynamic modes require an additional input file defining the positions of the jaw that constitutes the dynamic wedge, at regular intervals during its motion. A method for automating the generation of the input file is presented which will allow for the more efficient use of the DYNJAWS CM. Wedged profiles have been measured and simulated for 6 and 10 MV photons at three field sizes (5 cm x 5 cm , 10 cm x10 cm and 20 cm x 20 cm), four wedge angles (15, 30, 45 and 60 degrees), at dmax and at 10 cm depth. Results of this study show agreement between the measured and the MC profiles to within 3% of absolute dose or 3 mm distance to agreement for all wedge angles at both energies and depths. The gamma analysis suggests that dynamic mode is more accurate than the step-and-shoot mode. The DYNJAWS CM is an important addition to the BEAMnrc code and will enable the MC verification of patient treatments involving dynamic wedges.

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ID Code: 41212
Item Type: Journal Article
Keywords: BEAMnrc, Monte Carlo, DYNJAWS, Radiotherapy, Wedge
DOI: 10.1007/s13246-011-0060-x
ISSN: 0158-9938
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Physical Sciences not elsewhere classified (029999)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > Physics
Copyright Owner: Copyright 2011 Australasian College of Physical Scientists and Engineers in Medicine
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 12 Apr 2011 11:43
Last Modified: 27 Jun 2011 21:24

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